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                            <b>1.</b>
                        
                        什么是函数
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                            <b>2.</b>
                        
                        函数的基本使用
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                            <b>3.</b>
                        
                        函数的参数
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                            <b>4.</b>
                        
                        函数的返回值
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                            <b>5.</b>
                        
                        文档注释
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                            <b>6.</b>
                        
                        函数练习
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                            <b>7.</b>
                        
                        函数调用函数
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                            <b>8.</b>
                        
                        函数高级
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                        局部变量和全局变量
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                            <b>8.2.</b>
                        
                        函数返回值详解
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                            <b>8.3.</b>
                        
                        函数参数详解
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                            <b>8.4.</b>
                        
                        可变数据类型和不可变数据类型
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                        <h2 id="&#x51FD;&#x6570;&#x5E94;&#x7528;&#xFF1A;&#x6253;&#x5370;&#x56FE;&#x5F62;&#x548C;&#x6570;&#x5B66;&#x8BA1;&#x7B97;">&#x51FD;&#x6570;&#x5E94;&#x7528;&#xFF1A;&#x6253;&#x5370;&#x56FE;&#x5F62;&#x548C;&#x6570;&#x5B66;&#x8BA1;&#x7B97;</h2>
<h3 id="&#x76EE;&#x6807;">&#x76EE;&#x6807;</h3>
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<h3 id="&#x601D;&#x8003;&#x5B9E;&#x73B0;1">&#x601D;&#x8003;&amp;&#x5B9E;&#x73B0;1</h3>
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<li>&#x5199;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#x6253;&#x5370;&#x4E00;&#x6761;&#x6A2A;&#x7EBF;</li>
<li>&#x6253;&#x5370;&#x81EA;&#x5B9A;&#x4E49;&#x884C;&#x6570;&#x7684;&#x6A2A;&#x7EBF;</li>
</ol>
<h3 id="&#x53C2;&#x8003;&#x4EE3;&#x7801;1">&#x53C2;&#x8003;&#x4EE3;&#x7801;1</h3>
<pre><code class="lang-python"><span class="hljs-comment"># &#x6253;&#x5370;&#x4E00;&#x6761;&#x6A2A;&#x7EBF;</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">printOneLine</span><span class="hljs-params">()</span>:</span>
    print(<span class="hljs-string">&quot;-&quot;</span>*<span class="hljs-number">30</span>)

<span class="hljs-comment"># &#x6253;&#x5370;&#x591A;&#x6761;&#x6A2A;&#x7EBF;</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">printNumLine</span><span class="hljs-params">(num)</span>:</span>
    i=<span class="hljs-number">0</span>

    <span class="hljs-comment"># &#x56E0;&#x4E3A;printOneLine&#x51FD;&#x6570;&#x5DF2;&#x7ECF;&#x5B8C;&#x6210;&#x4E86;&#x6253;&#x5370;&#x6A2A;&#x7EBF;&#x7684;&#x529F;&#x80FD;&#xFF0C;</span>
    <span class="hljs-comment"># &#x53EA;&#x9700;&#x8981;&#x591A;&#x6B21;&#x8C03;&#x7528;&#x6B64;&#x51FD;&#x6570;&#x5373;&#x53EF;</span>
    <span class="hljs-keyword">while</span> i&lt;num:
        printOneLine()
        i+=<span class="hljs-number">1</span>

printNumLine(<span class="hljs-number">3</span>)
</code></pre>
<h3 id="&#x601D;&#x8003;&#x5B9E;&#x73B0;2">&#x601D;&#x8003;&amp;&#x5B9E;&#x73B0;2</h3>
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<li>&#x5199;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#x6C42;&#x4E09;&#x4E2A;&#x6570;&#x7684;&#x548C;</li>
<li>&#x5199;&#x4E00;&#x4E2A;&#x51FD;&#x6570;&#x6C42;&#x4E09;&#x4E2A;&#x6570;&#x7684;&#x5E73;&#x5747;&#x503C;</li>
</ol>
<h3 id="&#x53C2;&#x8003;&#x4EE3;&#x7801;2">&#x53C2;&#x8003;&#x4EE3;&#x7801;2</h3>
<pre><code class="lang-python"><span class="hljs-comment"># &#x6C42;3&#x4E2A;&#x6570;&#x7684;&#x548C;</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">sum3Number</span><span class="hljs-params">(a,b,c)</span>:</span>
    <span class="hljs-keyword">return</span> a+b+c <span class="hljs-comment"># return &#x7684;&#x540E;&#x9762;&#x53EF;&#x4EE5;&#x662F;&#x6570;&#x503C;&#xFF0C;&#x4E5F;&#x53EF;&#x662F;&#x4E00;&#x4E2A;&#x8868;&#x8FBE;&#x5F0F;</span>

<span class="hljs-comment"># &#x5B8C;&#x6210;&#x5BF9;3&#x4E2A;&#x6570;&#x6C42;&#x5E73;&#x5747;&#x503C;</span>
<span class="hljs-function"><span class="hljs-keyword">def</span> <span class="hljs-title">average3Number</span><span class="hljs-params">(a,b,c)</span>:</span>

    <span class="hljs-comment"># &#x56E0;&#x4E3A;sum3Number&#x51FD;&#x6570;&#x5DF2;&#x7ECF;&#x5B8C;&#x6210;&#x4E86;3&#x4E2A;&#x6570;&#x7684;&#x5C31;&#x548C;&#xFF0C;&#x6240;&#x4EE5;&#x53EA;&#x9700;&#x8C03;&#x7528;&#x5373;&#x53EF;</span>
    <span class="hljs-comment"># &#x5373;&#x628A;&#x63A5;&#x6536;&#x5230;&#x7684;3&#x4E2A;&#x6570;&#xFF0C;&#x5F53;&#x505A;&#x5B9E;&#x53C2;&#x4F20;&#x9012;&#x5373;&#x53EF;</span>
    sumResult = sum3Number(a,b,c)
    aveResult = sumResult/<span class="hljs-number">3.0</span>
    <span class="hljs-keyword">return</span> aveResult

<span class="hljs-comment"># &#x8C03;&#x7528;&#x51FD;&#x6570;&#xFF0C;&#x5B8C;&#x6210;&#x5BF9;3&#x4E2A;&#x6570;&#x6C42;&#x5E73;&#x5747;&#x503C;</span>
result = average3Number(<span class="hljs-number">11</span>,<span class="hljs-number">2</span>,<span class="hljs-number">55</span>)
print(<span class="hljs-string">&quot;average is %d&quot;</span>%result)
</code></pre>

                    
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